Temperature modification during Z movement !

vince_007

Hello,

I use Repetier Firmware (last version) on pibot v2.0 board and repetier server on Raspberry Pi 3.

When Z probing is activated (classic method in 3 points) and i move Z axis with manual command on Repetier Server, the temperatures (head and bed) are modified ! This modification generate an error and sensor are disconnect.
If i disabled Z probing in firmware, the temperature errors disappear during Z movement.

I'm sure that is a software problem, my hardware is OK, i have checked that.

What is the problem ?

Repetier

What do you exactly mean? You have temperatures disabled and moving z heats the bed AND extruder none the less? SOftware wise there is no connection between z move and temperature. Heater pins should be different from stepper pins.

vince_007

When i move Z axis with G0 or by HMI on repetier Server, i can see the temperature changed on the Pibot LCD.
The temperature graphic on repetier Server or Repetier host show the temperature problem (ramdom values).
All temperature values are impacted.

This problem resembles a variable overflow (interrupt routine problem ?).

This problem is new since the activation of Z levelling.

Repetier

If you say random temperature values this sounds like only reading temperature fails and the extruders are not really heating. Can you show such a graph where it happens? Doe sit go back to normal once you receive end z position or do you need to disable motors then to make readings normal. In the latter case it would look like enabling z motor causes some inference on temperature reading. Does normally not happen, but would explain random temperature values starting with z moves.

vince_007

This is not a hardware problem ! The temperature values are -20°c during Z movement.

The test is very simple, if i desactive "auto leveling" from LCD menu of pibot card and i move Z axis, i have no problem.
If i enable "auto leveling" from LCD menu (not by flashing new firmware), the problem appears directly.

My printer was working well before I activated the auto levelling.

That is very strange.

Repetier

-20 is a limit when signal level is 5V or 0v not sure what. No idea how you do it, but when enabling autolevel you seem to change a pin that causes temperature reading to fail. The problem is that just enabling autolevel is only setting a flag. Only if you measure with G32 your enable/disable gcode gets run so you can change something.
So would the command
M320
make it fail and
M321
make it work correctly? That would be the equivalent of turning on/off a sI understand it, but might be different from what you mean.

vince_007

I'm sorry, my English is not very good.

G32 works well the error does not appear during this command but after the auto level enable and only when Z move.

If I never activate the auto level, I never have a probe temperature problem, that is strange.

In file attached, you can see the complete log (with acknowledgement) of the problem, and below the summary without acknowledgement:

18:52:40.157 : G28

18:52:54.805 : X:0.00 Y:0.00 Z:325.500 E:0.0000

18:53:06.788 : G32

18:53:24.192 : Z-probe:5.11 X:20.00 Y:20.00

18:53:26.373 : Z-probe:5.04 X:280.00 Y:20.00

18:53:28.560 : Z-probe:5.43 X:150.00 Y:155.00

18:53:28.560 : plane: a = -0.0003 b = 0.0027 c = 5.0608

18:53:28.560 : Transformation matrix: 1.000000 0.000000 0.000258 0.000001 0.999996 -0.002656 -0.000258 0.002656 0.999996

18:53:28.560 : CurrentZ:5.48 atZ:5.84

18:53:28.560 : Z after rotation:5.84

18:53:28.560 : Printer height:325.14

18:53:28.560 : Info:Autoleveling enabled

18:53:28.560 : X:150.00 Y:155.01 Z:5.845 E:0.0000

18:53:40.499 : G0 Z320

18:53:48.239 : DebugLevel:14

18:53:48.239 : Other:: temp sensor defect

18:53:48.239 : heated bed: temp sensor defect marked defect

18:53:48.239 : Error:Printer set into dry run mode until restart!

18:53:48.239 : Disabling all heaters due to detected sensor defect.

18:53:48.299 : DebugLevel:14

vince_007

The log because attachment file does not work !

18:52:27.498 : wait

18:52:27.498 : ok 28

18:52:27.528 : T:27.68 /0 B:24.03 /0 B@:0 @:0 T0:27.68 /0 @0:0 T1:25.00 /0 @1:0

18:52:28.498 : wait

18:52:28.498 : ok 29

18:52:28.528 : T:27.80 /0 B:24.17 /0 B@:0 @:0 T0:27.80 /0 @0:0 T1:25.00 /0 @1:0

18:52:29.588 : wait

18:52:29.588 : ok 30

18:52:29.628 : T:27.80 /0 B:24.03 /0 B@:0 @:0 T0:27.80 /0 @0:0 T1:25.12 /0 @1:0

18:52:30.678 : wait

18:52:30.678 : ok 31

18:52:30.708 : T:27.80 /0 B:24.17 /0 B@:0 @:0 T0:27.80 /0 @0:0 T1:25.00 /0 @1:0

18:52:31.769 : wait

18:52:31.769 : ok 32

18:52:31.799 : T:27.68 /0 B:24.17 /0 B@:0 @:0 T0:27.68 /0 @0:0 T1:25.00 /0 @1:0

18:52:32.409 : wait

18:52:32.409 : ok 33

18:52:32.439 : T:27.80 /0 B:24.03 /0 B@:0 @:0 T0:27.80 /0 @0:0 T1:25.12 /0 @1:0

18:52:33.949 : wait

18:52:33.949 : ok 34

18:52:33.989 : T:27.68 /0 B:24.03 /0 B@:0 @:0 T0:27.68 /0 @0:0 T1:24.88 /0 @1:0

18:52:34.049 : wait

18:52:34.049 : ok 35

18:52:34.079 : T:27.68 /0 B:24.03 /0 B@:0 @:0 T0:27.68 /0 @0:0 T1:25.00 /0 @1:0

18:52:35.049 : wait

18:52:35.049 : ok 36

18:52:35.079 : T:27.68 /0 B:24.03 /0 B@:0 @:0 T0:27.68 /0 @0:0 T1:24.88 /0 @1:0

18:52:36.139 : wait

18:52:36.139 : ok 37

18:52:36.169 : T:27.68 /0 B:24.17 /0 B@:0 @:0 T0:27.68 /0 @0:0 T1:25.00 /0 @1:0

18:52:37.234 : wait

18:52:37.234 : ok 38

18:52:37.264 : T:27.68 /0 B:23.89 /0 B@:0 @:0 T0:27.68 /0 @0:0 T1:25.00 /0 @1:0

18:52:38.415 : wait

18:52:38.415 : ok 39

18:52:38.445 : T:27.68 /0 B:24.03 /0 B@:0 @:0 T0:27.68 /0 @0:0 T1:24.88 /0 @1:0

18:52:39.475 : wait

18:52:39.475 : ok 40

18:52:39.505 : T:27.56 /0 B:24.03 /0 B@:0 @:0 T0:27.56 /0 @0:0 T1:25.12 /0 @1:0

18:52:40.157 : G28

18:52:40.167 : wait

18:52:40.167 : ok 41

18:52:40.197 : T:27.56 /0 B:24.03 /0 B@:0 @:0 T0:27.56 /0 @0:0 T1:25.00 /0 @1:0

18:52:40.597 : ok 42

18:52:54.805 : X:0.00 Y:0.00 Z:325.500 E:0.0000

18:52:54.805 : ok 43

18:52:54.835 : T:27.44 /0 B:23.75 /0 B@:0 @:0 T0:27.44 /0 @0:0 T1:25.00 /0 @1:0

18:52:54.835 : ok 44

18:52:54.845 : T:27.44 /0 B:23.75 /0 B@:0 @:0 T0:27.44 /0 @0:0 T1:25.00 /0 @1:0

18:52:54.845 : ok 45

18:52:54.865 : T:27.44 /0 B:23.75 /0 B@:0 @:0 T0:27.44 /0 @0:0 T1:25.00 /0 @1:0

18:52:54.865 : ok 46

18:52:54.865 : T:27.44 /0 B:23.75 /0 B@:0 @:0 T0:27.44 /0 @0:0 T1:25.00 /0 @1:0

18:52:54.865 : ok 47

18:52:54.875 : T:27.56 /0 B:24.03 /0 B@:0 @:0 T0:27.56 /0 @0:0 T1:24.88 /0 @1:0

18:52:54.875 : ok 48

18:52:54.875 : T:27.56 /0 B:24.03 /0 B@:0 @:0 T0:27.56 /0 @0:0 T1:24.88 /0 @1:0

18:52:54.875 : ok 49

18:52:54.885 : T:27.56 /0 B:24.03 /0 B@:0 @:0 T0:27.56 /0 @0:0 T1:24.88 /0 @1:0

18:52:54.885 : ok 50

18:52:54.895 : T:27.56 /0 B:24.03 /0 B@:0 @:0 T0:27.56 /0 @0:0 T1:24.88 /0 @1:0

18:52:54.895 : ok 51

18:52:54.895 : T:27.56 /0 B:24.03 /0 B@:0 @:0 T0:27.56 /0 @0:0 T1:24.88 /0 @1:0

18:52:54.895 : ok 52

18:52:54.905 : T:27.56 /0 B:24.03 /0 B@:0 @:0 T0:27.56 /0 @0:0 T1:24.88 /0 @1:0

18:52:54.905 : ok 53

18:52:54.905 : T:27.56 /0 B:24.03 /0 B@:0 @:0 T0:27.56 /0 @0:0 T1:24.88 /0 @1:0

18:52:54.905 : ok 54

18:52:54.915 : T:27.56 /0 B:24.03 /0 B@:0 @:0 T0:27.56 /0 @0:0 T1:24.88 /0 @1:0

18:52:54.915 : ok 55

18:52:54.925 : T:27.56 /0 B:24.03 /0 B@:0 @:0 T0:27.56 /0 @0:0 T1:24.88 /0 @1:0

18:52:54.925 : ok 56

18:52:54.925 : T:27.56 /0 B:24.03 /0 B@:0 @:0 T0:27.56 /0 @0:0 T1:24.88 /0 @1:0

18:52:55.795 : ok 57

18:52:55.825 : T:27.68 /0 B:24.17 /0 B@:0 @:0 T0:27.68 /0 @0:0 T1:25.00 /0 @1:0

18:52:56.875 : wait

18:52:56.875 : ok 58

18:52:56.905 : T:27.68 /0 B:24.17 /0 B@:0 @:0 T0:27.68 /0 @0:0 T1:25.00 /0 @1:0

18:52:57.985 : wait

18:52:57.985 : ok 59

18:52:58.015 : T:27.56 /0 B:24.17 /0 B@:0 @:0 T0:27.56 /0 @0:0 T1:25.12 /0 @1:0

18:52:59.075 : wait

18:52:59.075 : ok 60

18:52:59.105 : T:27.56 /0 B:24.03 /0 B@:0 @:0 T0:27.56 /0 @0:0 T1:25.00 /0 @1:0

18:52:59.165 : wait

18:52:59.165 : ok 61

18:52:59.195 : T:27.68 /0 B:24.03 /0 B@:0 @:0 T0:27.68 /0 @0:0 T1:24.88 /0 @1:0

18:53:00.255 : wait

18:53:00.255 : ok 62

18:53:00.285 : T:27.56 /0 B:24.17 /0 B@:0 @:0 T0:27.56 /0 @0:0 T1:25.00 /0 @1:0

18:53:01.265 : wait

18:53:01.265 : ok 63

18:53:01.285 : T:27.56 /0 B:24.03 /0 B@:0 @:0 T0:27.56 /0 @0:0 T1:24.88 /0 @1:0

18:53:02.355 : wait

18:53:02.355 : ok 64

18:53:02.385 : T:27.56 /0 B:24.03 /0 B@:0 @:0 T0:27.56 /0 @0:0 T1:25.00 /0 @1:0

18:53:03.445 : wait

18:53:03.445 : ok 65

18:53:03.475 : T:27.56 /0 B:24.17 /0 B@:0 @:0 T0:27.56 /0 @0:0 T1:25.00 /0 @1:0

18:53:04.525 : wait

18:53:04.525 : ok 66

18:53:04.565 : T:27.56 /0 B:24.03 /0 B@:0 @:0 T0:27.56 /0 @0:0 T1:25.12 /0 @1:0

18:53:05.165 : wait

18:53:05.715 : ok 67

18:53:05.745 : T:27.68 /0 B:24.17 /0 B@:0 @:0 T0:27.68 /0 @0:0 T1:25.00 /0 @1:0

18:53:06.718 : wait

18:53:06.718 : ok 68

18:53:06.748 : T:27.56 /0 B:24.17 /0 B@:0 @:0 T0:27.56 /0 @0:0 T1:25.00 /0 @1:0

18:53:06.788 : G32

18:53:07.812 : ok 69

18:53:24.192 : Z-probe:5.11 X:20.00 Y:20.00

18:53:26.373 : Z-probe:5.04 X:280.00 Y:20.00

18:53:28.560 : Z-probe:5.43 X:150.00 Y:155.00

18:53:28.560 : plane: a = -0.0003 b = 0.0027 c = 5.0608

18:53:28.560 : Transformation matrix: 1.000000 0.000000 0.000258 0.000001 0.999996 -0.002656 -0.000258 0.002656 0.999996

18:53:28.560 : CurrentZ:5.48 atZ:5.84

18:53:28.560 : Z after rotation:5.84

18:53:28.560 : Printer height:325.14

18:53:28.560 : Info:Autoleveling enabled

18:53:28.560 : X:150.00 Y:155.01 Z:5.845 E:0.0000

18:53:28.560 : ok 70

18:53:28.600 : T:27.32 /0 B:24.03 /0 B@:0 @:0 T0:27.32 /0 @0:0 T1:25.00 /0 @1:0

18:53:28.600 : ok 71

18:53:28.690 : T:27.32 /0 B:24.03 /0 B@:0 @:0 T0:27.32 /0 @0:0 T1:25.00 /0 @1:0

18:53:28.690 : ok 72

18:53:28.720 : T:27.32 /0 B:24.03 /0 B@:0 @:0 T0:27.32 /0 @0:0 T1:25.00 /0 @1:0

18:53:28.720 : ok 73

18:53:28.750 : T:27.32 /0 B:24.03 /0 B@:0 @:0 T0:27.32 /0 @0:0 T1:25.00 /0 @1:0

18:53:28.750 : ok 74

18:53:28.760 : T:27.32 /0 B:24.03 /0 B@:0 @:0 T0:27.32 /0 @0:0 T1:25.00 /0 @1:0

18:53:28.760 : ok 75

18:53:28.770 : T:27.32 /0 B:24.03 /0 B@:0 @:0 T0:27.32 /0 @0:0 T1:25.00 /0 @1:0

18:53:28.770 : ok 76

18:53:28.780 : T:27.32 /0 B:24.03 /0 B@:0 @:0 T0:27.32 /0 @0:0 T1:25.00 /0 @1:0

18:53:28.780 : ok 77

18:53:28.790 : T:27.32 /0 B:24.03 /0 B@:0 @:0 T0:27.32 /0 @0:0 T1:25.00 /0 @1:0

18:53:28.790 : ok 78

18:53:28.800 : T:27.32 /0 B:24.03 /0 B@:0 @:0 T0:27.32 /0 @0:0 T1:25.00 /0 @1:0

18:53:28.800 : ok 79

18:53:28.800 : T:27.32 /0 B:24.03 /0 B@:0 @:0 T0:27.32 /0 @0:0 T1:25.00 /0 @1:0

18:53:28.800 : ok 80

18:53:28.810 : T:27.32 /0 B:24.03 /0 B@:0 @:0 T0:27.32 /0 @0:0 T1:25.00 /0 @1:0

18:53:28.810 : ok 81

18:53:28.810 : T:27.32 /0 B:24.03 /0 B@:0 @:0 T0:27.32 /0 @0:0 T1:25.00 /0 @1:0

18:53:28.810 : ok 82

18:53:28.820 : T:27.32 /0 B:24.03 /0 B@:0 @:0 T0:27.32 /0 @0:0 T1:25.00 /0 @1:0

18:53:28.820 : ok 83

18:53:28.830 : T:27.32 /0 B:24.03 /0 B@:0 @:0 T0:27.32 /0 @0:0 T1:25.00 /0 @1:0

18:53:28.830 : ok 84

18:53:28.830 : T:27.32 /0 B:24.03 /0 B@:0 @:0 T0:27.32 /0 @0:0 T1:25.00 /0 @1:0

18:53:28.830 : ok 85

18:53:28.840 : T:27.32 /0 B:24.03 /0 B@:0 @:0 T0:27.32 /0 @0:0 T1:25.00 /0 @1:0

18:53:28.840 : ok 86

18:53:28.840 : T:27.32 /0 B:24.03 /0 B@:0 @:0 T0:27.32 /0 @0:0 T1:25.00 /0 @1:0

18:53:29.660 : ok 87

18:53:29.690 : T:27.32 /0 B:24.03 /0 B@:0 @:0 T0:27.32 /0 @0:0 T1:25.12 /0 @1:0

18:53:29.690 : ok 88

18:53:29.710 : T:27.32 /0 B:24.03 /0 B@:0 @:0 T0:27.32 /0 @0:0 T1:25.12 /0 @1:0

18:53:29.710 : ok 89

18:53:29.730 : T:27.32 /0 B:24.03 /0 B@:0 @:0 T0:27.32 /0 @0:0 T1:25.12 /0 @1:0

18:53:29.730 : ok 90

18:53:29.730 : T:27.44 /0 B:23.89 /0 B@:0 @:0 T0:27.44 /0 @0:0 T1:25.00 /0 @1:0

18:53:30.740 : wait

18:53:30.740 : ok 91

18:53:30.770 : T:27.44 /0 B:24.03 /0 B@:0 @:0 T0:27.44 /0 @0:0 T1:24.88 /0 @1:0

18:53:31.830 : wait

18:53:31.830 : ok 92

18:53:31.860 : T:27.20 /0 B:24.03 /0 B@:0 @:0 T0:27.20 /0 @0:0 T1:24.88 /0 @1:0

18:53:33.011 : wait

18:53:33.011 : ok 93

18:53:33.041 : T:27.32 /0 B:24.03 /0 B@:0 @:0 T0:27.32 /0 @0:0 T1:25.00 /0 @1:0

18:53:34.021 : wait

18:53:34.021 : ok 94

18:53:34.051 : T:27.32 /0 B:24.03 /0 B@:0 @:0 T0:27.32 /0 @0:0 T1:24.88 /0 @1:0

18:53:35.121 : wait

18:53:35.121 : ok 95

18:53:35.151 : T:27.32 /0 B:24.17 /0 B@:0 @:0 T0:27.32 /0 @0:0 T1:24.88 /0 @1:0

18:53:36.201 : wait

18:53:36.201 : ok 96

18:53:36.231 : T:27.32 /0 B:24.03 /0 B@:0 @:0 T0:27.32 /0 @0:0 T1:24.88 /0 @1:0

18:53:37.288 : wait

18:53:37.288 : ok 97

18:53:37.318 : T:27.32 /0 B:24.03 /0 B@:0 @:0 T0:27.32 /0 @0:0 T1:24.88 /0 @1:0

18:53:37.928 : wait

18:53:37.928 : ok 98

18:53:37.958 : T:27.32 /0 B:24.03 /0 B@:0 @:0 T0:27.32 /0 @0:0 T1:24.88 /0 @1:0

18:53:39.479 : wait

18:53:39.479 : ok 99

18:53:39.509 : T:27.32 /0 B:24.03 /0 B@:0 @:0 T0:27.32 /0 @0:0 T1:25.00 /0 @1:0

18:53:40.499 : G0 Z320

18:53:40.509 : wait

18:53:40.509 : ok 100

18:53:40.529 : T:27.20 /0 B:24.03 /0 B@:0 @:0 T0:27.20 /0 @0:0 T1:24.88 /0 @1:0

18:53:40.659 : ok 101

18:53:40.659 : ok 102

18:53:40.689 : T:27.20 /0 B:24.03 /0 B@:0 @:0 T0:27.20 /0 @0:0 T1:25.00 /0 @1:0

18:53:43.939 : ok 103

18:53:44.969 : T:-20.00 /0 B:-55.00 /0 B@:0 @:0 T0:-20.00 /0 @0:0 T1:-20.00 /0 @1:0

18:53:47.209 : ok 104

18:53:48.239 : T:8.61 /0 B:-55.00 /0 B@:0 @:0 T0:8.61 /0 @0:0 T1:-20.00 /0 @1:0

18:53:48.239 : DebugLevel:14

18:53:48.239 : Other:: temp sensor defect

18:53:48.239 : heated bed: temp sensor defect marked defect

18:53:48.239 : Error:Printer set into dry run mode until restart!

18:53:48.239 : Disabling all heaters due to detected sensor defect.

18:53:48.299 : DebugLevel:14

18:53:50.400 : ok 105

18:53:50.430 : T:-20.00 /0 B:-55.00 /0 B@:0 @:0 T0:-20.00 /0 @0:0 T1:-20.00 /0 @1:0

18:53:50.430 : ok 106

18:53:50.440 : T:27.20 /0 B:24.17 /0 B@:0 @:0 T0:27.20 /0 @0:0 T1:25.12 /0 @1:0

18:53:50.440 : ok 107

18:53:50.460 : T:27.32 /0 B:24.17 /0 B@:0 @:0 T0:27.32 /0 @0:0 T1:24.88 /0 @1:0

18:53:50.460 : ok 108

18:53:50.460 : T:27.32 /0 B:24.17 /0 B@:0 @:0 T0:27.32 /0 @0:0 T1:24.88 /0 @1:0

18:53:50.460 : ok 109

18:53:50.470 : T:27.32 /0 B:24.17 /0 B@:0 @:0 T0:27.32 /0 @0:0 T1:24.88 /0 @1:0

18:53:50.470 : ok 110

18:53:50.470 : T:27.32 /0 B:24.17 /0 B@:0 @:0 T0:27.32 /0 @0:0 T1:24.88 /0 @1:0

18:53:50.470 : ok 111

18:53:50.480 : T:27.32 /0 B:24.17 /0 B@:0 @:0 T0:27.32 /0 @0:0 T1:24.88 /0 @1:0

18:53:51.490 : ok 112

18:53:51.520 : T:27.20 /0 B:23.89 /0 B@:0 @:0 T0:27.20 /0 @0:0 T1:24.88 /0 @1:0

18:53:52.580 : wait

18:53:52.580 : ok 113

18:53:52.610 : T:27.20 /0 B:24.03 /0 B@:0 @:0 T0:27.20 /0 @0:0 T1:24.88 /0 @1:0

18:53:53.671 : wait

18:53:53.671 : ok 114

18:53:53.701 : T:27.32 /0 B:24.03 /0 B@:0 @:0 T0:27.32 /0 @0:0 T1:24.88 /0 @1:0

18:53:53.761 : wait

18:53:53.761 : ok 115

18:53:53.799 : T:27.32 /0 B:24.03 /0 B@:0 @:0 T0:27.32 /0 @0:0 T1:24.88 /0 @1:0

18:53:54.854 : wait

18:53:54.854 : ok 116

18:53:54.884 : T:27.20 /0 B:24.17 /0 B@:0 @:0 T0:27.20 /0 @0:0 T1:25.00 /0 @1:0

18:53:55.584 : Repetier-Server disconnected.

Repetier

Ok, log shows it is not autolevel related but happens on the next z move. Since this makes no sense one reason could be insufficient free RAM. That always has unpredicted errors as consequence. Do you have 900 byte free ram when you connect. You should see it in the log upon connection or in arduino ide when you compile it, it also outputs free ram. Especially delta printers have the problem of insuffient ram often and need to reduce numbe rof subdivisions until they have enough ram.

vince_007

Arduino indicates 3510 bytes (42%) used for globale data and 4682 bytes of free for local data.
I think it's more of a pointer overflow.
My printer is cartesian type.

Repetier

That should be enough free ram to prevent out of memory.

Question is then why doe sit only overwrite temperatures for you. It may depend a bit on what functions you have as this changes what is stored where. The problem is for your z move the only difference is in this function:

void Printer::transformToPrinter(float x,float y,float z,float &transX,float &transY,float &transZ) {

#if FEATURE_AXISCOMP

// Axis compensation:

x = x + y * EEPROM::axisCompTanXY() + z * EEPROM::axisCompTanXZ();

y = y + z * EEPROM::axisCompTanYZ();

#endif

#if BED_CORRECTION_METHOD != 1 && FEATURE_AUTOLEVEL

if(isAutolevelActive()) {

transX = x * autolevelTransformation[0] + y * autolevelTransformation[3] + z * autolevelTransformation[6];

transY = x * autolevelTransformation[1] + y * autolevelTransformation[4] + z * autolevelTransformation[7];

transZ = x * autolevelTransformation[2] + y * autolevelTransformation[5] + z * autolevelTransformation[8];

} else {

transX = x;

transY = y;

transZ = z;

}

#else

transX = x;

transY = y;

transZ = z;

#endif

}

and as you see no pointers used for writing. So I do not think it depends on this.

What happens if you do only a very small z move? Does it still then cause sensors to fail?

Other strange thing is that it shot 3 heater measurements at once. Just saw that it gets fixed right after the error message. So whatever it is it is only disturbing for a short while.

Does this also happen on x and y moves? That's the same code as for z as all 3 are one package.

vince_007

When i do a little move on z axis, i have no problem ! But the temperature change a little on lcd display.

Axis X and Y are very fast (400mm/s) than z Axis (40mm/s), when i do a move on X or Y axis, the result as same as a little Z move, all temperature change a little !

Temperature measurement is in interrupt routine or no ?

Repetier

Yes, temperature is a interrupt method and we average temperatures over many results to rule out single bad readings.

If temperature only changes a bit it sounds like steps change reading. While z axis has many steps this affects z moves more. So if that would be true moving z very slowly would also cause a drop in temperature but maybe not as much as with fast z move not triggering the defect. On the other side your example had 2 wrong readings and then resumed to normal and I assume you z move was longer then 2 seconds?

vince_007

My Z travel is 350mm at 40mm/s, in my example, z movement during ~10sec.

Repetier

And what about the slow z move test?